Tracy Smith and 48 HOURS take viewers deep inside the investigation into the search for a multimillionaire real estate investor accused of killing his wife and staging a kidnapping plot, in “#FindPeterChadwick” to be broadcast Saturday, May 11 (10:00 PM, ET/PT) on the CBS Television Network.

“We had no idea this was going to become the logistical monster that it has,” says U.S. Marshal Craig McCluskey.

48 HOURS gained exclusive insight into the U.S. Marshals’ search for Chadwick, who was charged with killing his wife and then jumped bail.

Chadwick and his wife, Q.C. Chadwick, seemed to have the perfect life. College sweethearts, they were married for 21 years and had three sons. They lived in a gated community in Newport Beach, Calif. That dream life collapsed one day in 2012 when neither of the Chadwicks turned up to pick up their sons from the bus stop. Investigators had little idea that day the search for the couple would lead them on an international manhunt.

The next morning, San Diego authorities got a 911 call from Chadwick, claiming a house painter named Juan murdered Q.C. and forced Peter Chadwick to get her body out of the house. He said a man helped Juan and they were planning to cut up his wife’s body and dispose it south of the border. Law enforcement didn’t believe Chadwick, and he was arrested and charged with Q.C.’s murder. He was released on $1 million in bail. Then he vanished.

Members of the U.S. Marshals team reveal to 48 HOURS they’ve had some key clues to where he is. Chadwick is one of the U.S. Marshals’ 15 most-wanted fugitives.

“What makes him so difficult to find is the fact that he fled with a decent amount of money,” McCluskey says. “Approximately a million dollars.”

The U.S. Marshals have been getting a lot of leads about Chadwick, many from around the globe, and at least one from a scammer.

“Once you find a string, you’ve got to start pulling on it,” McCluskey says. “And we found a couple strings.”

He is counting on help from the public.

What led to the alleged murder? How has Chadwick been able to elude those trying to find him?

48 HOURS: “#FindPeterChadwick” is produced by Chuck Stevenson and Gayane Keshishyan Mendez. Michelle Fanucci is the field producer. Lauren White is the associate producer. Grayce Arlotta-Berner, George Baluzy and Kevin McLaughlin are the editors. Gail Zimmerman is the senior producer. Nancy Kramer is the executive story editor. Judy Tygard is the executive producer.